An image generation device includes a processor including hardware. The processor is configured to implement a reception process that receives a command selected by a player from a plurality of commands, a game process that includes a process that implements the effect of the received command, and a display process that displays a game image based on the results of the game process. The processor is configured to implement the game process that includes a process that implements the effect of the command that corresponds to information about a character that is the target of game play performed by the player and viewpoint information about the player.